Lawler 911E Instruction Manual
temperedwater.com
5330 East 25th St.
Indianapolis, IN 46218
Phone (317) 261-1212
Fax (317) 261-1208
INSTALLATION &
MAINTENANCE MANUAL
Design and specifications subject to change without notice.
Please refer to temperedwater.com to ensure most
current data sheet and other design solutions.
CAUTION: When maintaining and adjusting
the mixing valve, the delivered ushing uid
temperature shall be 60°F (15°C) to 95°F (35°C).
In circumstances where chemical reaction is
accelerated by ushing uid temperature, a medical
advisor should be consulted for the optimum
temperature for each application.
CAUTION: When maintaining and adjusting the
mixing valve, all xtures should be isolated from
use. Lawler Manufacturing Co., Inc. recommends
that you work safely at all times and in a manner
consistent with the OSHA Lock/Tagout standard,
29 CFR 1910.147 and other applicable standards.
temperedwater.com/patents
ENG. NO. 84907-A
ASSE 1071 Approved
ASSE Lead Free Certied
NOTICE! No mixing valve will work satisfactorily if improperly installed. We suggest, therefore, that you read
these instructions carefully before installing and follow directions as outlined. Handle the mixing valve with care.
Model 911®E/F
Thermostatic Mixing Valve
Emergency Eye/Fashwash
This installation & maintenance manual covers all
congurations of the Model 911E/F.
Maximum Inlet Pressure: 125 PSI
Recommended Supply Pressure: 65 PSI
Recommended Inlet Temperature: 120°F
When supplying 140°F or greater, additional outlet
controls should be used.
Set Point: 85°F
Gallon per minute ratings may vary depending upon
incoming water temperatures and pressures. Hot and cold
water inlet pressures must be equal.
Valve must be installed with check valves. If shut off valves
are installed in the shower line for maintenance purposes,
provisions shall be made to prevent unauthorized shut off.
CAPACITIES – MODEL 911E/F
Pressure Drop PSI 5 10 20 30 45
Tempered Flow GPM 2 3 5 7 10
Tempered Flow LPM 7.5 11 18 26 38
BYPASS CAPACITIES – MODEL 911E/F
Pressure Drop PSI 5 10 20 30 45
Cold Bypass GPM 1 2 4 5 7
Cold Bypass LPM 4 7.5 15 18 26
DIMENSIONS
Valve Number A N.P.T. B N.P.T. C D E
911 1/2” 1/2” 5” 4” 9”
Dimensions are for reference purposes only. For rough-in dimensions
please refer to Lawler’s Revit/BIM models found at temperedwater.com.
84907_911EF_STD_DRW_NODIMS.pdf
B
D
AA
C
E
Operating Principle
This Series 911 Emergency Eye Wash/Face Wash mixing
valve is made of a thermostat element with a stainless
steel sliding piston and liner housed in a bronze casting.
The thermostatic cartridge responds to temperature
changes in the hot and cold water supplies. In the event the
thermostatic element fails or the hot water supply fails, the
valve will provide full cold water bypass ow.
Installation
After installing the mixing valve, be sure to ush the system
thoroughly. Lawler recommends isolation and check valves
for proper maintenance.
Testing the Mixing Valve
The mixing valve and the emergency xtures it serves
should be tested weekly for proper operation.
Valve temperature test procedure is as follows:
1. Activate eye wash xture to observe and record
the temperature of the dial thermometer (T1). If the
temperature of the thermometer is not correct, readjust
the mixing valve according to the section “Setting the
Mixing Valve”
2. Observe the ow from the emergency xtures to ensure
an adequate ow of water.
In addition to testing for proper temperature, the cold water
by-pass and hot water shut down features of the mixing
valve should be tested weekly.
The test procedure is as follows:
1. Test valve temperature as described in Step 1 and Step
2 above.
2. Shut off the hot water supply to the mixing valve.
Observe the outlet ow from the emergency xtures
to ensure an adequate ow of cold water. A slight drop
in ow may occur after shutting down the hot water
supply to the mixing valve; however, the drop should be
minimal and for a short duration.
3. Open the hot water supply to the mixing valve. The
thermometer should return to the set temperature.
4. Shut off the cold water supply to the mixing valve. The
ow of water should shut down rapidly.
5. Open the cold water supply. The thermometer should
return to the set temperature.
The thermometer (T1) should be checked at least every six
months.
Replacing a Thermostat Cartridge
The thermostat replacement procedure is as follows:
1. Shut off the hot water supply and cold water supply to
the mixing valve.
2. Remove the four cover screws (#9) and remove the
front cover (#26) of the valve.
3. Remove thermostat (#11) from the valve body.
No special tools are necessary.
4. Insert a dowel rod, pencil (eraser-end), or narrow pen
into the open end of the thermostat. Push on the dowel
rod with your hand. If the thermostat feels spongy
or springy, the thermostat has lost its charge. If the
thermostat feels solid or hard, the thermostat is good
and operable.
5. Be sure that the stainless steel piston (#15) moves
freely up and down within the liner (#21). Lime or
calcium buildup should be cleaned with vinegar, green
scotch pad, or ne emery cloth.
Setting the Mixing Valve
Prior to adjusting the temperature on the emergency mixing
valve be aware that prior to shipping this valve was tested
and set at the factory. Please make sure that isolation
valves and check valves are installed and that incoming
hot and cold pressures are equal before any adjustment
is made. If these parameters are not present, DO NOT
proceed to “Setting the Mixing Valve” until these parameters
are met. IT IS ADVISED TO CALL THE FACTORY PRIOR
TO DOING ANY TEMPERATURE ADJUSTMENTS ON ANY
LAWLER EMERGENCY THERMOSTATIC MIXING VALVE.
This mixing valve has been set at the factory to deliver
85°F outlet ow. Should the valve require adjustment, or an
application require a different set temperature, proceed as
follows:
1. Contact the proper medical and safety authorities to
determine correct water temperature for the specic
application.
2. Use a spanner wrench to remove the tamper-resistant
cap screw.
3. Create a draw on the mixing valve by opening a
downstream eye wash xture.
4. Insert a 5/32” allen key into the cap opening of the valve
(V1) and seat in the adjustment screw (not shown). Set
the outlet temperature by turning the adjustment screw
clockwise to reduce temperature, counterclockwise
to increase temperature. Use thermometer (T1) to
measure the outlet temperature.
5. Replace cap screw.
Repair Kits and Assemblies
Item Description Contains Part No.
A Repair Kit 11-12-15-18-21+B 79854-00
B O-Ring & Gasket Kit 10-14-17-22-27 79961-00
C Cover Assy. 4-5-10-26 78271-00
D Piston & Liner Assembly 14-15-21-18-17 72904-60
E Thermostat Assy. 10-11-27 78490-00
Parts Break Down
9
26
4
10
5
12
15
25
27
22
14
21
18
11
17
GUARANTEE
We guarantee the Lawler Mixing Valve to be free from def ects in workmanship and material, and for
a period of one year from date of purchase, will replace any parts found by us to be defective. We will
not be held responsible, however, for any labor incidental to, or for any damages caused by defective
material. Each mixing valve is thoroughly inspected and tested under actual conditions at our factory.
Typical Installation Figure 1
When installed at or near the water heater and without a
recirculation system:
Install the valve as shown in Figure 1 with the mixing valve
positioned below the hot water tank or heater. If this is not
possible, pipe in a heat trap as shown.
Typical Installation Figure 2
When installed away from the water heater with a
recirculating pump on the hot water supply line:
Install the mixing valve as shown in Figure 2. The non-
circulated loop should be limited to 10 feet and must be
ushed periodically.
Notes: If the valve is installed 20 feet or more from the water heater, it is
important to recirculate the hot water supply to the mixing valve.
The mixing valve must be installed with inlet check valves and the shower
or the Eyewash/Facewash xture should be installed 4 to 10 feet from the
mixing valve. Hot and cold water inlet pressures must be equal.
Provisions shall be made to thermally isolate the valve.
WARNING: This product contains chemicals known
to the State of California to cause cancer and birth
defects or other reproductive harm.
(Installer: California law requires that this warning
be given to the consumer.)
For more information: www.oehha.org/prop65
CAUTION: The cold water line must be installed so
that it is not affected by excessively hot ambient
temperatures. Provisions shall be made to thermally
isolate the valve. Cold water pipe installed in the
ceilings of boiler rooms or rooms that increase
ambient temperature require a recirculating pump.
STORAGE
TANK
WATER
HEATER
HEAT TRAP
27” DROP
CW
CW HW
CV
CV
TO LOW
TEMPERATURE
FIXTURES
Water heater must
be installed per
manufacturers O+M
CV
CV
MODEL 911EF
Figure 1
Valve must be installed with check valves
STORAGE
TANK
WATER
HEATER
HEAT TRAP
27” DROP
CW
CW HW
CV
CV
1 VALVE PER
EYE FACE
WASH FIXTURE
Water heater must
be installed per
manufacturers O+M
CV
CV CV CV
CVCV
RECIRCULATION
PUMP
CV
MODEL 911EF
Figure 2
Valve must be installed with check valves
Series 911E/F Test Record
Location _______________________
Before you use this chart please make a copy for future testing records.
CAUTION: When maintaining and adjusting the mixing valve. The delivered ushing uid temperature shall
be 60°F (15°C) to 95°F (35°C). In circumstances where chemical reaction is accelerated by ushing uid
temperature, a medical advisor should be consulted for the optimum temperature for each application.
Date T1
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Date T1
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YEAR
YEAR YEAR
YEAR
YEAR
YEAR
Date T1
Jan
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YEAR YEAR YEAR
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1
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